<template>
  <view class="cart-container" v-if="cartItems.length > 0">
    <my-address></my-address>
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>

      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 商品列表区域 -->
    <uni-swipe-action>
      <block v-for="product in cartItems" :key="product.goods_id">
        <uni-swipe-action-item
          :right-options="swipeOptions"
          @click="swipeActionClickHandler(product)"
          >
        <view class="goods-item">
          <!-- 商品左侧图片区域 -->
          <view class="goods-item-left">
            <radio @click="radioChangeHandler(product)" :checked="product.goods_state" color="#C00000"></radio>
            <image
              :src="product.goods_small_logo || defaultImage"
              class="goods-pic"
            ></image>
          </view>

          <!-- 商品右侧信息区域 -->
          <view class="goods-item-right">
            <!-- 商品标题 -->
            <view class="goods-name">{{ product.goods_name }}</view>
            <view class="goods-info-box">
              <!-- 商品价格 -->
              <view class="goods-price"
                >￥{{ product.goods_price | formatNum }}</view
              >
                <!-- 商品数量 -->
              <uni-number-box @change="changeCount(product, $event)" :min="1" :value="product.goods_count"></uni-number-box>
            </view>
          </view>
        </view>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    <my-checkout></my-checkout>
  </view>

  	<!-- 购物车无商品时 -->
  <view class="empty-cart" v-else>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
import MyCheckout from "@/components/my-checkout.vue";
import MyAddress from '@/components/my-address.vue'
import {  mapState } from 'vuex'
import badge from '@/mixins/badge.js'
export default {
  mixins: [badge], 
  components: {
    MyAddress,
    MyCheckout
  },
  data() {
    return {
      swipeOptions: [
        {
          text: "删除", // 显示的按钮文本
          style: {
            backgroundColor: "#C00000", // 按钮的背景颜色
          }
        }
      ],
      defaultImage:
        'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
    }
  },
  onShow() {
    // 重新更新角标 - 因为immediate只会在页面加载完成之后执行一次
    if (this.total > 0) {
      uni.setTabBarBadge({
        index: 2,
        text: '' + this.total
      })
    }
  },


  computed: {
    ...mapState('cart', ['cartItems']),
  },
  methods: {
     // 点击了滑动操作按钮
    swipeActionClickHandler(item) {
      // console.log(item);
      this.$store.commit('cart/removeGoods', item)
    },
    changeCount(product, e) {
      // console.log(product, e);
      this.$store.commit('cart/updateCount', {
        product,
        num: e
      })
    },
    radioChangeHandler(item) {
      // item -> 当前修改选中状态的商品
      // this.$store.commit('模块名/mutation的方法', 传参)
      this.$store.commit('cart/updateState', item)
    }
  }
}
</script>

<style lang="scss" scoped>
.cart-container {
  padding-bottom: 100rpx;
}
.empty-cart {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 300rpx;

  .tip-text {
    font-size: 24rpx;
    color: gray;
    margin-top: 30rpx;
  }
}
.goods-item-right {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: space-between;

  .goods-name {
    font-size: 26rpx;
  }

  .goods-info-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .goods-price {
    font-size: 32rpx;
    color: #c00000;
  }
}
.goods-item {
  display: flex;
  padding: 20rpx 10rpx;
  border-bottom: 1rpx solid #f0f0f0;
  width: 750rpx;
  box-sizing: border-box;
  
  .goods-item-left {
    margin-right: 10rpx;
    display: flex;
    justify-content: space-between;
    align-items: center;

    .goods-pic {
      width: 200rpx;
      height: 200rpx;
      display: block;
    }
  }

  .goods-item-right {
    display: flex;
    flex-direction: column;
    justify-content: space-between;

    .goods-name {
      font-size: 26rpx;
    }

    .goods-price {
      font-size: 32rpx;
      color: #c00000;
    }
  }
}
.cart-title {
  height: 80rpx;
  display: flex;
  align-items: center;
  font-size: 28rpx;
  padding-left: 10rpx;
  border-bottom: 1rpx solid #efefef;
  .cart-title-text {
    margin-left: 20rpx;
  }
}
</style>